Warp-tensioning device for looms



Much 1o. 1925. 1f/5291457 J. NEUROTH v WRP TEHSIONING DEVICE FOR LOOMS I Filed Fer;l s, 192s s sheets-sheet 1 March 1o. 1.925. 1,529.497 LL NEUROTH WAR? TENSIONING DEVICE FOR LOOMS Filed Feb, 3 192s 3 sheets-sheet 2 C] v H::

l i T :l mvENToR wrrNEss Patented Mar. 10, 1925.

UNlTED STATES PATENTVQFFICE.

JOHN NEUROTH, OF SYR-ACUS, NEW YORK, ASSIGNOR T0 HARRY B. KNECHT, OF SYRACUSE, NEVI YORK.

WAR-P-TENSINING DEVICE FOR IIL'OOMS.

Application led February 3, 1923.

To all Iwhom t may concern:

Be it known that I, JOHN NEURoTr-I, a citizen of the United States of America, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Varp-Tensioning Devices for Looms, of which the following, taken'in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to a warp tensioning device as used more particularly in silk weaving in which the requirements for uniform tension and for varying the tension according to the nature of the silk are more exacting than in many other lines of weaving and the main object of my present invention is to provide simple and etcientmeans for maintaining this uniform tension and for easily and quickly varying it accordingto the nature of the work or on the same work as the leverage on the beam varies during the unwinding of the warp therefrom. Y

In other words, I have sought to make use of a series of coaxial rotary carriers or drums having internal buckets carryingat one side of the axis of rotation, weighted matter such as fine shot, sand or other material which will gradually be released and fall back into the underlying buckets as the drums are rotated, and to providesuitable means for transmitting rotary motion from both ends of the beam to the drums in such manner that the weight of the material carried in the buckets will afford a deiinite amount of resistance to the rotation of the beam by the warp as the latter is fed into the machine during the weaving operation.

yAnother object is to enable the beam to be rotated backwardly independently yof the weighted drums for rewinding the warp thereon in case the machine is `reversed as is sometimes necessary in repairing imperfections in the fabric or for any other purpose.

A further Objectis to provide means for successively transmitting motion from the end drums to the remaining drums and to enable any drum to be disconnected from its adjacent drum for varying the load or tension upon the warp.

Other objects and uses relating to specific parts of the device will be brought out in the following description.

Serial No. 616,677.

In thevdrawings, Figure 1 is a rear elevation, partly in section, of a warp beam and tensioning device for the warp operatively connected thereto, the dotted lines at the innerends of the load carriers indicating the position to which the inner end carriers may be adjusted for disconnecting them from the adjacent carriers.

Figure 2 is an end view of the same mechanism.

Figure 3 is a transverse vertical sectional view taken on line 3 3, Figure l.

Figure 4 is an end face view of one of the rotary carrie-rs showing more particularly the position of the clutch members thereon.

Figure 5 is an enlarged top plan, partly in section, of `one of the drums and adjacent portion of the main supporting frame showing more particularly the clutch for connecting and disconnecting the driven sprocket wheel to and Yfrom said drum.

Figure 6 is an enlarged detail sectional view taken on line 6-6, Figure 2.

I Figure 7 is anfend view of a modied form of my invention. j

In order that my invention may be clearly, understood I have showna portion o-f the main supporting frame -1- of a silk weaving loom -uponwhich is mounted a warp beam -2- and a shaft --3, the warp beam being provided with suitable trunnions 1lwhich are journaled in bearings -5'- on opposite sides of the frame to permit the rotation of the warp beam.

,access maybe had t-o the underlying mechanism of the loom, and also tobala-nce the weight at both ends of the warp beam and, furthermore to permit certain sectionsof the drums to be 'displaced endwise from other sections as will be presently described.`

Each drum -8- is made up of a series of in this instance, five similar and interchangeable hollow sections -10- arranged end to end coaxially and loosely upon'the shaft Y fori relative' rotary "m0ve=me'nt, n

" vided With clutch pins -l8-` movable in eaclrsection constituting` a closed holl'oyv car-` rier Capable of receiving and retaining WeightedAj matter were' such aswlin'eshot, f

sand or other heavy7 comminu'ted ymaterial which may be free to fall back on to the bottom of the carrier is carriedv up- Wardly b v the rotation thereof.

For this latter purpose,"each--'carri'er `is provided With a circumferential series of venes/ori flanges V'-414-projecting inwardly v"tlfirornftheperiphery thereolI in uniform cireu'niierentially'Y spaced relation and preferhav'ing their innerv ends deflected in thedire'etion offrvotation to constitute a cor- =respondingnumberfof buckets for 'receiving the'vveighted material -as ect-and carrying it from the "bottomupwardly some distance to't-he'frear ofthe aXis'of" rotation andallovving it to fall back into the bottomof the l 'cf-arrieraslthe several' buckets approach their limits of-upva'rd movement.

= By lthis arrangementfthe' rotation of each Vafr'iier iii-'the direction indicated vby thev arf' rovv'f Will elevate a predetermined.load

vtending to; resist such rotation While the ag- Ig'rega'te load of the several carriers Yis utili'ze'd in 'the manner presently described in beam.

vThe carriers v-1l0- V at 'the extreme outer *ends of the drums #8- `are preferably 'Y driven directly from the corresponding ends "of the'yvafrp beam tlironjgh'tlie medium of 'tWof 'spiocket'7-cliains "#l2---v and sprocket "vlieels -'l3'- iand* --`l4-, Athe sprocket -wvh'eels e513- zbei-'ng` loosely mounted y upon AV'their respective trunnions Yfor relative rotary and yaxial*movement in. one' `direction thus 'permitting vlrelative rotation "of'the avai-p 'beam airoppe'site direction. The opposite ends oftliewa'rp beam 2- and' adjacent 'ends' of 'the sprocket iivlieels are "provided ivith cooperative ratch- I-eticlutchIteeth le-'- yieldinglylield 1in' enjgargementby edillsprin'g's 4i-'16- rand arranged" to rtransiiiit rotary? motionV from the :Warp beam tothe sprocket Wheels assaid Warp beam is gradually"rotated vby fthe feed Jof. the"y w'vagrp- =intoy thefmachine during the 'Weaving operation and p'eri'n'itting'tlie'free backward? rotation oi' vthe Warp Vbeam by -hand'rela-tively to the spro'eket Wheel '13W Vfor rewin'dingthe Warp thereon incase' the .Weaving mechanism should fbe reversed -l"or anyr reasonft'o fsu'chl an 'eitent as to slafcken the Warp.

lThe sprocket lWheels +14- are also loose- 1y mounted i upon opposite en ds of the sha-it .but aire normally inn driving connec- -tion with "fthe -'-"acljacentcarriers Q10- throul `the @medi-um f of 'clutch collars e .which are 'pliable upon-the hubs of the lla'djacentfsprocl'retwvheels and are pro- `guideopenings in the sprocket Wheel into and *out* l(if-"similar "openings" fin the vadjacent'carriers -lO- thus permitting the driving means for the carriers to be confnectedftoand *released from driving connection with the sprocket Wheels and Warp beam.

Any suitable means may be employed Vfor shifting the clutch collars +18- to .and

from their lockingpositions and for this purpose isV shown a pair of hand levers #20+YAfulc'rurned"K intern'iedi'ate their Vends :at 421-' to `suitable brackets #22-v on "the -main J supporting :frame 1- 'and provided `vvith forked arms -Qfengagingin 'annuflar grooves 24.- 'in saidfcollars.

"Aspre'vionsly stated, rotary motion@ is transmitted from the beam -2- to vthe outer 'end carriers 4through -the( me- :diuin offthe chain belts l2-#and that (each carrier '-10% is loosely 'mountedfupon' its supportingfshaft -3-' and 4it therefore be-i comes 'necessary to' provide means lfor 'trans` niitting rotary 'motion' from Athe outer 'end "carriers to thefremaining carriers in ordei vthat they'may "all 'operate' 'inunison and at the 'same Atime be capableof detachment from 4vthe companion `carriers for 'varying' the'load resistance, and 'resultant tension von the' Warp. For this 'latter purpose, 'the 'ad]acent end races or the"severar'carriers"are provided With clutch members T25- consistin'g ol` 'radialijibs 'those' :ofte-ach( carrier' normally Adverlfapping upon tliose'bi the adjacent car- `rie'r for 4suceessively imparti-ng 4rotaryv niovtionv *fromA one carrier 'to thefother `fromVv the outer yends inwardly and alsof perm'ittingithe @carriers to be lsuccessively detached one "from the oth'erir'omfthe inner ends toward kthe outer ends ofthe drumsiby simply moving saidcaiir-ie'rs axially and inwardly as shown' by dotted lines 'in'Fig-iire 1.

ilu order'that the'driving connection bc- "tvve'en the adjacent carriers may be automatically maintained, the adjacent edges of conipanion ribs #275- 'areundercutso as to interlock With each other axially as Well as l circumterentially which perinfi'tsthe car Tiers' V"selbe-easily"displaced'one from the other fromthe'inner en'dstoward the Vouter ends of the 'drums v'by slight' 'forward rotation r`followed byinward axial movement, the

'object-"of` which is topermit the load upon the Warp to be expeditiously varied at will by simply disconnecting 'one or more car- -riersit'ro'm lthe`-reinaining carriers.

Any suitable fmeans 'may be employed `for this purpose Vis kprovided idlerpulleys k-f-QG- rotatably ymounted upon separate; brackets "2?-V whichin turn are slidably mounted lill adjusting position by clamping bolts -28-, Figure 6.

The carriers lO- may be made of sheet metal or other suitable material and are provided with removable end plates -lO- normally held in place by screws 29", Figure l to permit access to the interior for filling and removing the material -awhen desired.

Suitable brake members --30- are pro vided for engaging the peripheries of the end carriers lO- and as shown in Figure 2, are mounted upon pedal levers -3ladapted to engage toothed racks -32- for holding the brake members in their adj usted position, the object of these brakes being to hold the carriers against backward rotation in case the warp is slackened by reversing the weaving mechanism. The construction shown in Figure 7 is somewhat similar to that previously described except that the load carrying drums as -8 and their supporting shaft as -3- are disposed mainly at the front of the vertical plane of the aXis of the warp beam w2- and that the chains as -l2- are arranged to carry extra but relatively smaller sprocket wheels -l4fwhich are mounted upon suitable levers i* having their front ends pivotally mounted upon opposite ends of the shaft and their rear ends provided with weights -tl-- The sprocket wheels -llare journaled upon studs -42- which are adjustable forwardly and rearwardly in slots 43M in the levers lO- and are held in their adjusted position by nuts -44-, thereby serving as belt tighteners for the chains and also as a means for placing additional load upon tl e warp beam 2 when the latter is actuated b v the warp during the Weaving operation by reason of the tendency of rear sides of the chain to lift the weight.

The weight -41- is also adjustable along and upon the rear end of the lever M to vary the load.

This device is particularly useful in the use of extra heavy warp which requires an increased tension which may be varied by releasing one or more of the carriers of the drums -8- or by shifting the position of the stud 4% along the slot -43- or by varying the positions of the weights -41- along the levers.

Operation.

lVhen the machine is running normally for weaving purposes, the warp as Hwis unwound from the beam -2- thereby rotating said beam in the direction indicated by arrow -ywhich through the medium of the clutch teeth imparts rotary motion to the adjacent sprocket Wheels 13- and thence through the chains --12-N to the sprocket wheels -14- from which latter vrotary motion is imparted to the adjacent end carriers l0- through the medium of the clutch pins --l8-. l

Thisrotary motion of the end carriers -lO- is transmitted to the remaining car-- riers through the clutch ribs rlhis rotary motion of the beam and carriers is of course, very slow and regularly intermittant as the weft threads are fed through the warp by the action of the shutties in the usual manner, and owing to the tact that the weighted material as -a is carried upwardly some. distance to the rear of the axis of rotation of the carriers and the buckets on the front side of the axis are empty, it produces a definite load resistance to ther rotation of the warp beam and thereby produces a definite tension upon the warp threads which load and tension is substantially constant by reason of the chain belt connections between the beam and load carrying drums. V

lt is advisable to place upon the shaft -3 as many carriers as may be required to give the maximum load or tension upon the strongest warp and then to regulate the load or tension by disengaging one or more of the inner-most carriers from their companion carriers.

This reduction of the load in the manner described may be required during the weaving operation as the warp is gradually un- -wound from the beam and may be readily affected without stopping the machine 0r producing any excessive strains upon the warp by simply detaching one or more of the inner carriers and allowing it to idle loosely upon the shaft 3-.

It is also evident that similar load adjustment may be made to conform to the requirements for different kinds of warp ac cording to the nature thereof.

In case it should become necessary to reverse the operation of the machine for any purpose, which would cause a slackening of the warp between the harness and the beam, the latter may be readily rotated backward by hand through the slipping of the clutch connections -15- without affecting the op eration of the sprocket wheels or chains in which case it is advisable to set the brakes BO- to hold the tensioning drums against backward rotation, leaving the load just where it was at the time of reversal so that when the regular weaving operation of they machine again begins, the brakes may be released and the warp tensioned by the load in the several carriers 10.- which may then be in operation. i

It will also be noted that a similar release result may be obtained by releasing the clutch pins -18- in which case the warp beam may be rotated backward without affecting the operation of the Weighted carriers.

Without departing `from the spirit of this invention 'so long as Va plurality of lseotions or Carriers vare employed insuch manner that.

yone"may"be'c'leta'ehed from the other for varying the Warp tensioning load.

I'clalm: '1. 'In a Warp tens1on11ng device for looms,

Va'Warp-beam, a plurality of relatively rotav table Coaxial Carriers each having means for finaintaining a substantially uniform load Vresistance to its rotation in ione direction,

leluteh [connections 'betvveensaid carriers, and

fdl-iving coi'i'neotionsbetvveen the Warp-beam and 'one of ;said"earriersto =rotatethe flatter in said direction.

2. In a Warp tensioning devieeforllooms, a Warp bea1n,a plurality offliollovv coaxial Carriers,relatively rotatable about -a hori# Zontal `avis i and each containing 'Weighted matter loose therein andwlneansv `for lifting said'fniatt'erat the upwardly moving side ther eof and for releasing it as'=it*a'pproaches 'the top, driving Connections between theV vbeam and `one ofthe carriers, and :clutch connectionsl between 'the several lcarriers.

In Witness whereof I havefhereunto set rny hand'fthis 27th/day of VJanuary, .lf-923.A

v JOHN NEUROTH. Witnesses z l-L: E. GHASE,

f RITAV GAM-Pomme.

Certicate of Correction.

t is hereby certiied that the name of the assignee in Letters Patent No. 1,529,4L97, granted March l0, 1925, upon the application of John Neuroth7 of Syracuse, New York, for an improvement in Tar-p Tensoning Devices for Looms, was erroneously Written and printed as Harry B. Knecht, Whereas said nlame shoudd have been Written and printed as Henry B. Knecht, as shown by the records of assignments in this office; and that the said Letters Patent should fbe read with this correction therein that the same may conform to the record of the .ease in the Patent Ofice.

Signed and sealed this 31st day of March, A. D. 1925.

[SEAL] KARL FENNING,

loting Commissioner of Pazens. 

